/**
 * Copyright (C) 2007 The AsyncMail Group <asyncmail@googlegroups.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.asyncmail.util.streamscanner;

import java.io.InputStream;

public interface StreamScanner {

    /**
     * Scan the given inputStream. If a non null String is returned the message
     * should rejected
     * 
     * @param in
     *                The InputStream
     * @return The result
     * 
     * 
     * TODO: Maybe we should return something simalar to HookResult
     */
    public String scan(InputStream in);

}
